Sven Rudolf Sidenius Gyldmark (21 April 1904 – 5 October 1981) was a Danish film score composer. He was the brother of Hugo Gyldmark and Leonard who were also composers. Filmography (1975) Nødd
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09d4d88e22ab4424cd42f4da5eeb1f4017c3ef50ef4ba36a885d9a1024bd051. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2a53be4-3710-4a93-9506-771e15d7f17a.json and https://artists.proofprofile.net/proofs/artist/b2a53be4-3710-4a93-9506-771e15d7f17a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Stormy Night Of Terror (US Version) - from "Reptilicus"
The Golden Age Of Science Fiction, Vol. 7
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232521b8d1d732935454575ca7f984802338630008df8e95c7b200e5e72af1dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2423603.
Opening Credits (Danish Version) - from "Reptilicus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cbc663aaa21903054670830cd139507057c676214ee2e5452b3c62bc6b3e5b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2423600.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Main Title / Lapland Discovery / News Around The World / Denmark’s Akvarium (US Version) - from "Reptilicus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4001692e16c811259959ee905c5194d3c631190cefea1c7b469a1a64f9ba79. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2423602.
Reptilicus Rampage / Finale (US Version) - from "Reptilicus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6549013ef816ed2430508e00c4b5d43cd7936cdfd397b6a8e037c58c81877df0. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2423604.